Multiple Choice
DNA is replication in which of the following directions?
16. Cell Division
DNA Replication
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During which phase of the cell cycle does DNA replication occur?
A
S phase
B
G2 phase
C
M phase
D
G1 phase
Verified step by step guidance1
Understand the cell cycle: The cell cycle is divided into four main phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has a specific role in cell growth and division.
Focus on DNA replication: DNA replication is the process by which a cell duplicates its DNA to ensure that each daughter cell receives an identical copy of the genetic material.
Identify the phase responsible for DNA replication: DNA replication occurs during the S phase (Synthesis phase) of the cell cycle. This is when the cell synthesizes a complete copy of its DNA.
Eliminate other options: G1 phase is primarily for cell growth and preparation for DNA replication. G2 phase involves preparation for mitosis, including protein synthesis and organelle duplication. M phase is the mitotic phase where the cell divides.
Conclude that the correct answer is the S phase, as this is the only phase where DNA replication occurs.
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